Sometimes I write things in C so I remember how.

shuffleList.c

#include <stdio.h>

#define ARR_SIZE 9

void swap(int* a, int* b) {
  if (a == b) {
    return;
  }

  *a = *a ^ *b;
  *b = *a ^ *b;
  *a = *a ^ *b;
}

unsigned int randomInt() {
  FILE* urandomFile = fopen("/dev/urandom", "r");            
  unsigned int rand;            
  fread(&rand, sizeof(rand), 1, urandomFile) ;
  fclose(urandomFile);
  return rand;
}

void shuffle(int list[], int size) {
  for (int i = size - 1; i > 0; i--) {
    int swapIndex = rand() % (i + 1);
    swap(&list[i], &list[swapIndex]);
  }
}

void printArray(int list[], int size) {
  for (int i = 0; i < size - 1; i++) {
    printf("%d, ", list[i]);
  }
  printf("%d\n", list[size - 1]);
}

int main() {
  unsigned int randSeed = randomInt();
  srand(randSeed);
  
  int list[ARR_SIZE] = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
  
  for (int i = 0; i < 20; i++) {
    shuffle(list, ARR_SIZE);
    printArray(list, ARR_SIZE);
  }
}